Liquid-depth-indicating device



June 24, '1930. H. w. KING 1,755,130

' LIQUID DEPTH INDICATING DEVICE Filed A ril 16, 1925 I m I w H m ll l 'HMHHHHHHHH 3140mm florace Will inf.

- member having an openlower end secured to said nipple and registering with said firstmentioned vertically extending passage therein, said tubular member extending upwardly withinsaid tan-k. and having a closed upper end and" a liquid fuel inlet opening communicating with theinterior of said tank at the full depth to be measured, an air supply tube extending within said tubularm'ember and first-mentioned p'assage in said nipple, said airsupplyl tube extending air tight through the upper end of said tubular member and having openupper and lower ends respectively terminating above the surface of liquid fuel in'said tank 'and'in the transverse passage in said head, a tube within said tubular member communicating with said secondmentioned vertically extending passage in said nipple and having an opening in its upper end, a pressure gage, and means connectmg sa d gage wlth said second-mentioned vertically extending passage in said nipple.-

5. The combination with a tank containing liquid and means for withdrawing liquid terior of said hollow member and said'passage in "communication with the liquid 'in said tank, an air supply tube for introducing air into said passage, a pressure gage, and a pressure tube for placing saidfpress'ur-e gage in communication with theupper portion of the interior of said hollow member. I

6. The combination with a tank containing liquid and means for withdrawing liquid ,from said tank, of a'memberjadapted to be secured to the bottom ofsaid tank an'dhav- 1 inga passage, means 'connectingsaid passage with said withdrawlng means, a'tubular member extend ng upwardlyw thm said tank and having a closed upper endand an opening in its lower end communicating withsaid pas-- mg withthe interior of said tank at the full depth of the liquidto be measured for plac-' ring the interior of saidtubular-member and said passage in communicationwith the liquid in said tank, an air supply tube forintroducupwardly within said tubular member and having an opening communicating with the, nterlor of said tubular member near its upper end, a pressure gage-and connections therefrom, communicating' with said lastimentioned tube.

111g air into said passage, a tube extending,

7.- .The combinationowithatank containing llquld, of a body adaptedtobesecured to-the bottom of-said tank and having apassagefor vthe liquid, ;1,tubular member;mountedfgupon said, body and extending 1 upwardly within saicljjtank,--said tubular member having an f upper' closed end and an opening in its lower also a -second opening communicating with the interior otsaid tank thefulldepthfto munication with the interior of saidtank,an

air supply tube extending longitudinally of said-tubular member and having an opening otsaidtubular member and an opening in its lower end in communication with 7 said: pas: sage, a pressure tube mounted upon said body and extendingupwardly within said tubular.

member, and having arr-opening in its upper endin communication with the interior' of said tubular membernearithe upper end at the latter, a pressure gage and connect ons be measured, for pla'cingsaid; passagein com-l V v in itsupper. endlocated above theupperend,

therefrom communicating with the lowerend of said pressure tube. i Y Y 8; The combination with a' tankcont'ain-;. 7

ing liquid, ofan air'chamber extending ups wardly: into said tank and having a closed upperend and communicating vat its lower end with; said tank, means" connected to the bottom oil-said tank in communication the lower end of said air, chamber "fortwithdrawing liquid from said tank,an upward-. ly extending pressure tube having its upper end in communication with the. upperend of said air chamber andhavingits lower'end 1 below said tank, a pressurejgauge and connection therefromcommunicating with the;

loweriend of said. pressure tube, and'meansforl introd ucing air into; said air chamberincluding; an upwardly extending (air supply tube having'its upper end 'opening into said tank above the normal level of the liquid, the

lower end oflsaidtube communicating with the'lower portion ofsaid air chamber.

9. The. combination with a tank "containing liquid, of a body adapted to be secured; to the-bottom of said tank and having a passage for the liquid, a tubular member mountedupon 'saidjbody and extending upwardly within said tank, saidtubular member 'hav-f ing an upper closed endand an opening in its lower end, communicating withsaid pas sage and also a second opening communicatmg with the interior ofsaidtankat the 'full depth to. be measured, for placingsaidpas 1 1 I v fSaidta-nk, an upwardly extendingpressure tube mounted upon saidbody and having its y upper end in communication with the. upperii portion of saidtubular member,means for l introducing air into said tubular sage in communication with the interior of membenfa 'pressurefgauge and connections therefrom: 'communicat ng wlth'the lower-end 'oiffsaid 7 pressure tube.

in iliqu-id, ot a body adapted to secured 10. The combination with tank contain-L -70 I end-communlcatmgiwith sald passage v and 4 1 V r j v 1,766,130:

to the bottom of said tank and having a'pas sagefor the liquid, a tubular member mounted upon said body and extending upwardly within'said tanlgsaid tubular memberhaving an upper closedend 'and an openingiin 1 its lower end communicating with said pas v sage and also a second opening communi; catingwith the interior of said tank at the p L full depth to be measured, for placingsaid m passage'in communication with the interior of said tank, means for-introducing air into said tuhular member, a pressuretubemounted upon saidbody and extending upwardly within said tubular member and having an 1 'openingin its upper end in, communication with the .interior'of said tubular member 'nezuithe upperend ofth'e latter, a pressure 7 gauge andconnections therefrom communieating with the .lower end of said pressure gg'tube,said body, tubular member, and pressuretuhe being constructed-t0 form a unit detachably secured'to said tank. w 11; The comb'nat' on with a tank contain- 7 ing liquid, of an airchamber extending up-.

5 wardlywithin said tank andhavi'ngla closed 7 upper endfand" communicating at; itslower 1 end with the liquid insaid tank means for withdrawing liquid from" said tank, a con-. nection plaoing said liquid'with'drawing aomeans' incommunication with the lower pora user said tank and air chamber, a pressure tube openirigiiito theupper' portion of air chamber, a, pressure gauge, agconneat-ion between- Said pressure tube and g u n n pward y extending air p: ply tube havingan openupper end in com-; munication with the air above the'norinal level of liquid withinsaid'ytank and having its lower endopening into said first men- 4D tioned connection at appoint below said air chamber; 4 V v V V In testimony whereof I; affixj my signature; 7 i i f HORACE'W. KING. 

